H3 Extruder - Ultimaker original knurled bold V3 clamp

thingiverse

I needed a clamp to secure my Ultimaker knurled bolt V3 instantly. At first, I tried using the original drive bolt lock but found it didn't fit securely due to its loose gear design. Fortunately, I came up with two easy-to-assemble parts that solve this problem effectively. To create the clamp, simply insert part one into the gap near the end of the bolt and place part two on top which provides a rock-solid grip.